Something smells rotten in redisplay

[Juanma Barranquero]

The redisplay bug connected to setting `scroll-conservatively' to a
non-zero value is still there.

I'm now getting it while editing a HTML file with the standard
`html-mode' from sgml-mode.el. In some cases Emacs enters an (apparently
endless) loop while scrolling down. The backtrace from C-g says just:


Debugger entered--Lisp error: (quit)
  recursive-edit()
  byte-code("Æ!,HG(B ,HH    (B!,H\(Bn,C?
  debug(error (quit))



Also, while scrolling down sometimes the hollow cursor shape has been
partly drawn over the mode-line:

   --
  |XX|  This is the (partially shown) last line of the current buffer
--|  |----------------------------------------------------------------
  |  |  This is the mode-line
   --


The upper part of the cursor is filled, and the lower part is hollow.


                                                           /L/e/k/t/u